Connect your Firebase Realtime Database to enable real-time sync across all devices.
console.firebase.google.com → Create a new projectfirebaseConfig object
Get your VAPID key:
Firebase Console → Project Settings → Cloud Messaging tab → scroll to Web Push certificates → Generate key pair → copy the key pair value
⚡ For instant phone notifications (like WhatsApp), also deploy the Cloud Functions using the SETUP GUIDE in your project folder.
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